Drawing-board support



.Jan; 3, 1928. 1,654,594

J. W. M ADAM DRAWING BOARD SUPPORT Original Filed Feb. 9. 1924 PatentedJan '3, 1928.

UNITED STATES PATENT OFFICE.

JOSIAH W. MGLADAM, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

DRAW-iNG-BOARD SUPPORT.

Original application filed February 9, 1924, Serial No; 691,754. Dividedand this application filed September 22, 1925. Serial No. 57,888. V

This invention relates to drawing board sup orts.

The ob'ject'is to provide simple and ellicient supporting means forattachment to drawing boards of the portable'type, or to other similarboards or devices, whereby "the same may be held in the desired degreeof inclination while'in use, the said device being readily applied'toany board employing the usual spaced cleats on thebackthe'reof withoutanyin'ate'ri'al change being necessary.

improved device being adjusted so as to hold the same in such foldedposition.

The present application is "a div'i-sion of an application filedsby fineon February 9, 1924: for a patent on adrawing'board, said applicationbearing Serial Number 691,754.

A full and complete understanding o'f'the present invention may be,obtainedfr'om a consideration ofthefollowing detailed description,takenfinjconnection with the accompanying drawing forming a part of thisspecification; itfbeing understood thatwhile the drawing shows practicalformof the invention, the latter is not-lto be confined to strictconformity with the showing thereof, "but maybe changed or modified, solong as such. changes or modifications mark no material departure fromthe salient features of the invention, as specifically pointed out intheap'pended claims. a a

In the drawing, which similar reference "characters designatecorresponding parts throughoutthesever'al figures:

Figure 1 is a perspective View showing the improved support applied toan ordinary drawing board and adjusted to support the same in aninclined position.

Figure 2 is a similar view of one nd of the board, the same beinginfinver'ted position, and the supporting device shown in foldedposition infull lines and in active position in dotted lines.

Fig-tire 3 is a detail perspective view of a Another object t0 provideadjustsupporting arm and strut rod.

Figure 4 is an elevation, partly in section, showing a cushlonlng meanslocated at the pivotal oint between the supporting arm and strut rod. LFigure 5 is 'a detail section illustrating the manner of pivotallyconnecting the supporting arm to the cleat of the drawing board.

Referring to the drawing there is shown a drawing board 1 of an ordinarykind, the

' same having cleats 2 rabbeted into the ends of the board, andextending below the same for the purpose of stiffening and strengtheningthe board and preventing warping of the same, and to act as feet to restupon the table ordesk and elevate the board above the same in awell-known manner.

The cleats are provided adjacent to one end, which constitutes the frontend thereof,

with a-series of openings or sockets 3 extending preferably, though notnecessarily, entirely through the same from side to side thereof andtransversely V therethrough. These series of openings are arranged indirectlalign ment with each other, longitudinally ofthe board and may beof any desired number. 7

Adjacent to the other ends of the cleats there are provided'in eachcleat, a si-ngle opening A extending thereth-rough in the same manner,and spaced from the openings 4 thereare also provided transverseipassageways 5, all of said openings being located in the projectingportions of the cleats, as clearly shown in the drawing. a c

Supporting arms '6, formed of suitably stiifwire of proper gage haveeach one vend formedinto an eye 7,, while their other ends are bentsubstantially at right angles to form rock shafts 8, which areadapted-to be mounted in the aforesaid passageways "5, they ends of.said shafts being upset, as at 9, where extending slightly through saidpassageways to prevent inward movement of said s'haftsin their bearings,while the supporting arms are located, at the inner sides of theextending portions of the cleats and prevent any, outward movement, thesaid armsbeing thus free to s'wmgbackward or forward in, lines parallelwith, the cleats and transversely of the boardproperg Strut rodslO,formed of the same'material as the supporting arms, have each one endformed into an eye 11 corresponding tothe eyes at the free ends of thearms 6, to which they are pivotally connected by asuitable rivet, andthe opposite or free end of each strut rod is bent at substantial rightangles to form terminal bars 12 which are adapted to be inserted intoany alined pair of the openings or sockets 3, as clearly shown in Figure1 of the drawing, The strut rods are considerably longer than thesupporting arms 6, and with the board arranged right side uppermost, aswhen in use, the ends of said arms, where provided with the'eyes 7 restupon the table or desk and support the board at an angle thereto, therods 10 hold" ing the same rigidly, in position. mien more or lessinclination is desired to the board, the bars 12 may be inserted in anyother desired pair of openings dwhen the effective length of thesupporting arms is changed, in an obvious manner. 'When it isdesired tofold up the supporting means,

' as when the board is not in'use, as shown in Figure 2 of the drawing,the rods 10 are disengaged from the series of openings 3 and the arms 6swung forwardly and down against the under side or back of the boardadjacent to the inner opposed faces of the extended portions of thecleats, and at the same time the struts 10' are swung about theirpivotal CODIlGLtlOIlS with the arms in a reverse direction, when theterminal bars 12 may be inserted into the aforesaid openings 1 toeffectually hold the device in folded position. n

In Figure 8 there is shown a portion of a supporting arm 6 which has itsfree terminal bent into an angularly disposed arm 13 and the strut 10has its terminal formed into a plurality of coils 14 in surroundingrelation to the arm 13, the end of which is bent downwardly as at 15 toprevent the coils from slipping off, all of which constitutes a modifiedform of pivotal connection between the supporting arm and its coactingstrut. in

In Figure 4 of the drawing there is shown a supporting arm 6 and a strut10 associated therewith, each of which have pivotal eyes 16 looselyconnected by a suitable rivet to permit their relative movement, and thearm 6 is extended beyond the pivot and formed into an angularly bent arm17, the

'free end of which is preferably enlarged so as to receive and retain arubber socket 18 which is adapted to bear upon the surface supportingthe drawing board to prevent damaging the latter, and to prevent noisewhen the board is movedduring use. This isalso shown in Figure 1.

From the foregoing it will be .seen that simple, strong and durablemeans has been provided, which may be easily attached to an ordinarydrawing board without any material alteration in the same, and that thedevice serves to support the board at different degrees of inclinationto suit the wishes of the draftsman or artist, the parts comprising thedevice being simple and few in number and occupying small space heneaththe board and between the cleats and 7 being capable of being foldeddown and held- 'in an out-of-the-way position so that the boardmay restflat upon the deskor table if desired, or may be easily handled intransporting or storing the same.

What is claimed is g e 1. A drawing board having cleats each providedwith a series of sockets-adjacent to one end, separate supporting armspermaat different" angles relative to the'board. 1

2. A drawing board having end "cleats each being provided with a seriesof spaced soc rets' 1n their inner faces and ad acent to one endthereof, supporting arms pivotally connected to thecleats neartheiropposite ends to swing parallel thereto, separate strut rods eachpivotally connected to the' free ends of the supporting arms and eachhaving a terminal barfor engagement with one of the sockets to hold thesupporting arm at different angles relative to the board, and an armprojecting inwardly from each pivotal connection and provided withrubber cushions. i i

3. A drawing'board having spaced, transverse cleats attached thereto,eachcleat hav- .mgnear one end a corresponding ser es of spaced alinedsockets extending parallel to the face of the board, a supporting armterminally pivoted on the inner face of each of the cleats adjacenttothe opposite ends thereof and adaptedto swing longitudinally ofthe same,astrut rod longer than the supporting arm and pivotally connected at oneend'to the free end of each ofthe arms andhaving an outwardly extendingterminal at its free end for insertion in one-of the sockets-to rigidlymaintain the arm in angular rela tion to the board and support the boardat different angles when inverted..

4. Means for supporting a drawing board at different angles ofinclination, said board having opposite, transverse .end cleatsprojecting on its under side and provided, near their upperends,withalined oppositeopenings formed in their inner faces, supporting armseach having an angular terminal pivotally mounted in said openings andheld from removal therefrom, said cleats also having at their oppositelower or front ends a series of alined sockets or openings passingtransversely through the sameand parallel to the under face of theboard, and

strut rods longer than the supportingarmsa and each pivotally connectedat one end to the free ends of the said arms and having their other orfront ends angular-1y bent outward in opposite directions and adapted tobe inserted in any opposite pair of sockets to maintain the supportingarms at an angle to the board and hold the board at the desiredinclination.

5. Means for supporting a drawing board at an angle relative to asupporting surface comprising transverse cleats projecting from the backof the 'boardand provided with a {plurality of alined horizontal socketsor openings near their lower ends, opposite supporting arms horizontallypivoted to the cleats near their upper ends and adapted to swingtransversely of the board to lie fiat against the same at the innersides of the cleats, strut rods each hinged at one end to the free endsof the arms and having outturned terminals at their opposite ends to fitin any opposite pair of the plurality of sockets to maintain the arms inangular relation to the board and support the same at an inclination.

6. Means for supporting a drawing board at an angle relative to asupporting surface comprising transverse cleats projecting from the backof the board and provided wit-h a plurality of alined horizontal socketsor openings near their lower ends, opposite supporting arms having theirupper ends turned outwardly and permanently pivoted to the cleats neartheir upper ends, said supporting arms being adapted to be swung 1transversely of the board to lie flat against the same at the innersides of the cleats, strut rods each hinged at one end to the free endsof'th'e arms and having out-turned terminals at their opposite ends tofit in any opposite pair of the plurality of sockets at the lower endsof the cleats to maintain the arms in angular relation to the board andsupport the same at an inclination, said cleats also having other alinedhorizontal sockets or openings beyond the pivotal points of the arms forthe reception of the said outturnedterminals of the strut rods when thelatter are in reversed position and the arms are flat against theunderside or back of the board, to lock the drawing board supports ininactive position.

In testimony that I claim the foregoing as my own I have hereto afiixedmysignature.

JOSIAH W; McA'DAM.

